A Low-Jitter Cell-Based Digitally Controlled Oscillator With Differential Multiphase Outputs

A low-jitter digitally controlled oscillator (DCO) with multiphase differential outputs and good linearity is presented. The DCO is composed of four differential delay cells and can achieve linear tuning over a wide frequency range. The proposed fully differential delay cell comprises logic cells in...

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Veröffentlicht in:	IEEE transactions on very large scale integration (VLSI) systems 2015-04, Vol.23 (4), p.766-770
Hauptverfasser:	Ming-Chiuan Su, Shyh-Jye Jou, Wei-Zen Chen
Format:	Artikel
Sprache:	eng
Schlagworte:	All-digital CMOS integrated circuits Delays differential digitally controlled oscillator (DCO) Inverters Jitter low jitter multiphase Oscillators Tuning Varactors
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container_title	IEEE transactions on very large scale integration (VLSI) systems
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creator	Ming-Chiuan Su Shyh-Jye Jou Wei-Zen Chen
description	A low-jitter digitally controlled oscillator (DCO) with multiphase differential outputs and good linearity is presented. The DCO is composed of four differential delay cells and can achieve linear tuning over a wide frequency range. The proposed fully differential delay cell comprises logic cells in standard library and varactors. The measured rms jitter and pk-pk jitter from 2.5-GHz carrier are 2.827 and 29 ps, respectively. The power consumption is 6 mW from a 1.2 V supply. An experimental prototype is designed using 65-nm CMOS technology, and the chip area is 156 μm × 92 μm 2 .
doi_str_mv	10.1109/TVLSI.2014.2314740
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subjects	All-digital CMOS integrated circuits Delays differential digitally controlled oscillator (DCO) Inverters Jitter low jitter multiphase Oscillators Tuning Varactors
title	A Low-Jitter Cell-Based Digitally Controlled Oscillator With Differential Multiphase Outputs
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